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28,812 Article Results

Estimation of Turbidity in Water Treatment Plant using Hammerstein-Wiener and Neural Network Technique

10.11591/ijeecs.v5.i3.pp666-672
M. S Gaya , L. A. Yusuf , Mamunu Mustapha , Bashir Muhammad , Ashiru Sani , Aminu Tijjani Aminu Tijjani , N. A. Wahab , M. T.M. Khairi
Turbidity is a measure of water quality. Excessive turbidity poses a threat to health and causes pollution. Most of the available mathematical models of water treatment plants do not capture turbidity. A reliable model is essential for effective removal of turbidity in the water treatment plant. This paper presents a comparison of Hammerstein Wiener and neural network technique for estimating of turbidity in water treatment plant. The models were validated using an experimental data from Tamburawa water treatment plant in Kano, Nigeria. Simulation results demonstrated that the neural network model outperformed the Hammerstein-Wiener model in estimating the turbidity. The neural network model may serve as a valuable tool for predicting the turbidity in the plant.
Volume: 5
Issue: 3
Page: 666-672
Publish at: 2017-03-01

FPGA Based Pattern Generation and Synchonization for High Speed Structured Light 3D Camera

10.12928/telkomnika.v15i2.6146
Muhammad; Sungkyunkwan University Atif , Sukhan; Sungkyunkwan University Lee
Recently, structured light 3D imaging devices have gained a keen attention due to their potential applications to robotics, industrial manufacturing and medical imaging. Most of these applications require high 3D precision yet high speed in image capturing for hard and/or soft real time environments. This paper presents a method of high speed image capturing for structured light 3D imaging sensors with FPGA based structured light pattern generation and projector-camera synchronization. Suggested setup reduces the time for pattern projection and camera triggering to 16msec from 100msec that should be required by conventional methods.
Volume: 15
Issue: 2
Page: 926-933
Publish at: 2017-03-01

Hybrids Otsu method, Feature region and Mathematical Morphology for Calculating Volume Hemorrhage Brain on CT-Scan Image and 3D Reconstruction

10.12928/telkomnika.v15i1.3146
Sumijan; Gunadarma University Sumijan , Sarifuddin; Gunadarma University Madenda , Johan; Gunadarma University Harlan , Eri Prasetya; Gunadarma University Wibowo
Traumatic brain injury is a pathological process of brain tissue that is not degenerative or congenital, but rather due to external mechanical force, which causes physical disorders, cognitive function, and psychosocial. These disorders can be permanent or temporary and accompanied by the loss of or change in level of consciousness. Segmentation techniques for Computed Tomography Scanner (CT scan) of the brain is one of the methods used by the radiologist to detect abnormalities or brain hemorrhage that occurs in the brain.  This paper discusses the extraction area of a brain hemorrhage on each image slice CT scan and 3D reconstruction, making it possible to visualize the 3D shape and calculating the volume of a brain hemorrhage. Extraction of brain hemorrhage area is based on a combination of Otsu algorithm, the algorithm Morphological features and algorithms region. For the reconstruction of a 3D brain hemorrhage area of the bleeding area on a 2D slice is done by using a linear interpolation approach.
Volume: 15
Issue: 1
Page: 283-291
Publish at: 2017-03-01

Mammography Image Segmentation: Chan-Vese Active Contour and Localised Active Contour Approach

10.11591/ijeecs.v5.i3.pp577-583
Mahfuzah Mustafa , Hana Najwa Omar Rashid , Nor Rul Hasma Abdullah , Rosdiyana Samad , Dwi Pebrianti
Breast cancer is one of the most common diseases diagnosed among female cancer patients. Early detection of breast cancer is needed to reduce the risk of fatality of this disease as no cure has been found yet for this illness. This research is conducted to improve the Gradient Vector Flow (GVF) Snake Active Contour segmentation technique in mammography segmentation. Segmentation of the mammogram image is done to segment lesions existence using Chan-Vese Active Contour and Localized Active Contour. Besides that, the effectiveness of these both methods are then compared and chosen to be the best method. Digital Database of Screening Mammograms (DDSM) is used for the purpose of screening. First, the images undergo pre-processing process using the Gaussian Low Pass Filter to remove unwanted noise. After that, contrast enhancement applied to the images. Segmentation of mammograms is then conducted by using Chan-Vese Active Contour and Localized Active Contour method. The result shows that Chan-Vese technique outperforms Localized Active Contour with 90% accuracy.
Volume: 5
Issue: 3
Page: 577-583
Publish at: 2017-03-01

Diurnal Variability Of Underwater Acoustic Noise Characteristics in Shallow Water

10.12928/telkomnika.v15i1.4510
Yasin; Universiti Teknologi Malaysia Yousif Al-Aboosi , Abdulrahman; Universiti Teknologi Malaysia Kanaa , Ahmad Zuri; Universiti Teknologi Malaysia Sha'ameri , Hussein; University of Mustansiriyah A. Abdualnabi
The biggest challenge in the underwater communication and target locating is to reduce the effect of underwater acoustic noise (UWAN). An experimental model is presented in this paper for the diurnal variability of UWAN of the acoustic underwater channel in tropical shallow water. Different segments of data are measured diurnally at various depths located in the Tanjung Balau, Johor, Malaysia. Most applications assume that the noise is white and Gaussian. However, the UWAN is not just thermal noise but a combination of turbulence, shipping and wind noises. Thus, it is appropriate to assume UWAN as colored rather than white noise. Site-specific noise, especially in shallow water often contains significant non-Gaussian components. The real-time noise segments are analyzed to determine the statistical properties such as power spectral density (PSD), autocorrelation function and probability density function (pdf). The results show the UWAN has a non-Gaussian pdf and is colored. Moreover, the difference in UWAN characteristics between day and night is studied and the noise power at night is found to be more than at the day time by around (3-8dB).
Volume: 15
Issue: 1
Page: 314-321
Publish at: 2017-03-01

Characterization of Electromagnetic Valveless Micropump

10.12928/telkomnika.v15i2.6115
M. Q. A; Universiti Teknologi Malaysia Ruslia , Pei; Universiti Tunku Abdul Rahman Song Chee , Pei; Universiti Teknologi Malaysia Ling Leow
This paper presents an electromagnetically-actuated micropump for microfluidic application. The system comprises two modules; an electromagnetic actuator module and a diffuser module. Fabrication of the diffuser module can be achieved using photolithography process with a master template and a PDMS prepolymer as the structural material. The actuator module consists of two power inductors and two NdFeB permanent magnets placed between the diffuser elements. The choice of this actuation principle merits from low operating voltage (1.5 Vdc) and the flow direction can be controlled by changing the orientation of the magnet vibration. Maximum volumetric flow rate of the fabricated device at zero backpressure is 0.9756 µLs-1 and 0.4659 µLs-1 at the hydrostatic backpressure of 10 mmH2O at 9 Hz of switching speed.
Volume: 15
Issue: 2
Page: 771-777
Publish at: 2017-03-01

Compact Structure and Low Losses for Wilkinson Power Divider at 9400MHz Frequency for X-Band Antenna System

10.12928/telkomnika.v15i1.3475
Arief Budi; Indonesian Institute of Sciences Santiko , Novita Dwi; Indonesian Institute of Sciences Susanti , Taufiqqurrachman; Indonesian Institute of Sciences Taufiqqurrachman
This paper is under in-depth investigation due to suspicion of possible plagiarism on a high similarity indexThis paper presents design and implementation 2-way Wilkinson power divider at 9400 MHz frequency which matched to 50Ω transmission line. This design applies Microstrip line with Roger Duroid 5880 Substrate and uses software simulation (ADS 2011) to help the design. This Wilkinson power divider designed at 9400MHz for use on Antenna X-Band Radar System. The desire objective is a power divider can be used in compact circuit board with low insertion loss and good matching for all ports. The dimension of the devices after fabrication is 30mm x 35mm. The voltage standing wave ratio (VSWR) for all port for both dividers is less than 1.33,  Forward transmission the devices as divider or the split power ratio (S21 and S31)is about -2.522dB, reverse transmission the devices as combiner (S12 and S13) is about -2.861dB. The isolation between the both output ports shows a good isolation, less than -11.271dB. The overall result of simulation and fabrication show a fairly good result.
Volume: 15
Issue: 1
Page: 143-149
Publish at: 2017-03-01

A Designing Dairy Cattle Facilities Based on Statics and Dynamic Zoometry by Using Artificial Neural Network

10.12928/telkomnika.v15i1.4677
Sugiono; Brawijaya University Sugiono , Rudy; Brawijaya University Soenoko , Rio; Brawijaya University L Lukodono
The dairy cattle productivity is very depending on the quality of their facilities and their environment condition. A lot of researches have been done in this area, but it is not developing the knowledge of animal dimensions and behaviours correlated with their facilities design. Complexities of dynamics zoometry is very depending on cow behaviours that it forced to use neural network (NN) approaching. Hence, the purposes of the paper  is to create the concept of static and dynamic zoometry approach to guide the ergonomics facilities design and the modern of dairy cattle house based on zoometry data by using artificial neural network. The research is started with study literature of anthropometry, CAD design, dairy cattle, facility design and neural network. The next step is collecting the data of cow dimensions for static zoometry (17 variables) and cow behaviours for developing the concept of dynamics zoometry (5 variables). The static data is used as input factor and dynamic data as desire of Back Propagation NN model. The result of BPNN training is used to design the dairy cattle facilities, e.g. 3D CAD house with minimal length = 357.67 cm, minimal width = 132.03 cm (per tail) and minimal height = 205.28 cm. Finally, the paper is successfully developed the concept of zoometry approach and BPNN model as pioneer of implementing comfort knowledge.
Volume: 15
Issue: 1
Page: 399-406
Publish at: 2017-03-01

Correlation of Objective Assessment of Facial Paralysis with House-Brackmann Score

10.12928/telkomnika.v15i2.6128
Wan; Universiti Malaysia Pahang Syahirah W Samsudin , Rosdiyana; Universiti Malaysia Pahang Samad , Kenneth; Universiti Teknikal Malaysia Melaka Sundaraj , Mahfuzah; Universiti Malaysia Pahang Mustafa , Nor; Universiti Malaysia Pahang Rul Hasma Abdullah
This article illustrated a brief review of some objective methods in assessing facial nerve function for facial nerve paralysis which were correlated with House-Brackmann Grading System (HBGS). A rigorous search of online databases such as Springer, Elsevier and IEEE was conducted from June, 2015 to November, 2016 to discover and analyze the previous works in facial nerve assessment methods for facial paralysis. Several domains such as facial grading system and methods used to evaluate the facial nerve function were extracted for further analysis. Different keywords were used to acquire the studies based on the desire criteria. A total of 8 articles were identified and were analyzed for inclusion in this search. In conclusion, this review has presented an initial overview for further improvements in objective facial nerve assessment which has to be correlated with subjective assessment to make it more reliable and useful in clinical practice. 
Volume: 15
Issue: 2
Page: 829-835
Publish at: 2017-03-01

Exploration of the Potential of Reclaimed Waste Cooking Oil for Oil-Immersed Power Transformers

10.12928/telkomnika.v15i2.6151
Imran; Universiti Teknikal Malaysia Melaka Sutan Chairul , Sharin; Universiti Teknikal Malaysia Melaka Ab Ghani , Hidayat; Universiti Teknikal Malaysia Melaka Zainuddin , Nor; Universiti Teknikal Malaysia Melaka Hidayah Rahim , Mohd; Kawasan Institusi Penyelidikan Kajang Aizam Talib , Nor; Universiti Teknikal Malaysia Melaka Hafiz Nor Rahman
In this study, reclaimed waste cooking oil is proposed as an alternative insulating liquid for oil-immersed power transformers. Reclamation is carried out by heating a mixture of waste cooking oil and Fuller’s Earth adsorbent and followed by filtration. Propyl gallate antioxidant is then added into the filtered oil. Four oil samples are investigated in this study: (1) new cooking oil (NCO), (2) waste cooking oil (WCO), (3) reclaimed oil (RWCO) and (4) reclaimed oil with propyl gallate antioxidant (RWCOPG). The AC breakdown voltage, moisture content and total acid number is measured for all oil samples according to the ASTM D1816, ASTM D1533 and ASTM D974 standard test method, respectively. The results show that the AC breakdown voltage is highest for the RWCOPG sample (28.08 kV), which is 0.4% higher than the standard requirement of 20 kV. The moisture content for this sample is 180.60 ppm, which is still below the allowable limit of 200 ppm. However, the total acid number is highest for the RWCOPG sample which suggests that it has high acidity. It is indicated that the antioxidant-reclaimed waste cooking oil has potential to be used as an insulating liquid for oil-immersed power transformers, but much work is still needed to reduce the total acid number of this oil.
Volume: 15
Issue: 2
Page: 957-963
Publish at: 2017-03-01

Image De-noising on Strip Steel Surface Defect Using Improved Compressive Sensing Algorithm

10.12928/telkomnika.v15i1.3164
Dongyan; Hebei University of Technology Cui , Kewen; Hebei University of Technology Xia , Jingzhong; Hebei University of Technology Hou , Ahmad; Hebei University of Technology Ali
De-noising for the strip steel surface defect image is conductive to the accurate detection of the strip steel surface defects. In order to filter the Gaussian noise and salt and pepper noise of strip steel surface defect images, an improved compressive sensing algorithm was applied to defect image de-noising in this paper. First, the improved Regularized Orthogonal Matching Pursuit algorithm was described. Then, three typical surface defects (scratch, scar, surface upwarping) images were selected as the experimental samples. Last, detailed experimental tests were carried out to the strip steel surface defect image de-noising. Through comparison and analysis of the test results, the Peak Signal to Noise Ratio value of the proposed algorithm is higher compared with other traditional de-noising algorithm, and the running time of the proposed algorithm is only26.6\% of that of traditional Orthogonal Matching Pursuit algorithms. Therefore, it has better de-noising effect and can meet the requirements of real-time image processing.
Volume: 15
Issue: 1
Page: 540-548
Publish at: 2017-03-01

Intelligent Control of Wind/ Photovoltaic Microgrid Information Fusion

10.12928/telkomnika.v15i1.3961
Jianhong; Research center for renewable energy generation engineering, Ministry of Education, HoHai University Zhu , Wen-xia; Institute of Electrical Engineering, Nantong University, Nantong JiangSu, China Pan
A full-function Micro-grid must have an advanced energy storage device. Intelligent control with multi-information fusion was proposed in this paper. Control targets were acquired by mixed application of various strategies, such as Micro-grid peak load shifting be used to reduce State Utility Grid (SUG) supply pressure, SUG connection be controlled flexibly to maintain Micro-grid load working reliably, Micro-grid power production and load supply demands of SUG and Micro-grid be predicted to plan battery energy storage in advance, actual monitoring date be used to control overcharge and over-discharge, State of Charge (SOC) be managed to realize battery efficient storage  and full life cycle as far as possible. All designs were integrated with forecasting and monitoring data from different locations, such as Micro-grid supply side and demand side, the SOC of storage system, the active and reactive power from SUG side, so as to control the battery charge and discharge behavior and SUG connection operation dynamically. Micro-grid could not only operate stand-alone by self-supply in most cases, in the case of power production surplus or equipment malfunction, the Micro-grid could also delivery energy to SUG or take power from the SUG flexibly. The scheme used fully of new energy, could ensure region power supply reliably and be used widely in application.
Volume: 15
Issue: 1
Page: 264-272
Publish at: 2017-03-01

Battery Charge Control by State of Health Estimation

10.11591/ijeecs.v5.i3.pp508-514
Pradita O. Hadi , Goro Fujita
Battery lifetime is one of importance consideration in smart system with energy storage system, because it is shorter than others. Extended of battery lifetime can give benefit to entire system, especially to reduce cost. The lifetime is commonly estimated by State of Health (SOH). Decreasing of SOH indicates degradation of battery. It can be influenced by the battery operation, so that operational management is needed. This study proposes control block for charging battery by using decreasing value of SOH as reference. The control block is implemented in battery system that connected to DC bus by bidirectional chopper. Numerical simulation study is performed by using PSIM software version 10.0. The result shows that the proposed block control is successfully used. Moreover, the relative error is less than 2% for delta SOH and less than 1% for battery power.
Volume: 5
Issue: 3
Page: 508-514
Publish at: 2017-03-01

Automatic Summarization in Chinese Product Reviews

10.12928/telkomnika.v15i1.5099
Li zhen; Capital Normal University Liu , Wan di; Capital Normal University Du , Han shi; Capital Normal University Wang , Wei; Capital Normal University Song
With the increasing number of online comments, it was hard for buyers to find useful information in a short time so it made sense to do research on automatic summarization which fundamental work was focused on product reviews mining. Previous studies mainly focused on explicit features extraction whereas often ignored implicit features which hadn't been stated clearly but containing necessary information for analyzing comments. So how to quickly and accurately mine features from web reviews had important significance for summarization technology. In this paper, explicit features and “feature-opinion” pairs in the explicit sentences were extracted by Conditional Random Field and implicit product features were recognized by a bipartite graph model based on random walk algorithm. Then incorporating features and corresponding opinions into a structured text and the abstract was generated based on the extraction results. The experiment results demonstrated the proposed methods outpreferred baselines.
Volume: 15
Issue: 1
Page: 373-382
Publish at: 2017-03-01

Aromatic Herbs Classification by using Discriminant Analysis Techniques

10.11591/ijeecs.v5.i3.pp530-535
N. F.M. Radzi , A. Che Soh , A. J. Ishak , M. K. Hasan , U. K. Mohamad Yusof
An electronic nose was used to distinguish between selected herb samples according to their family group species. This paper aims to evaluate the potential of using the electronic nose to characterize three groups of families of twelve herb species based on the discriminant analysis approach. The feature extraction involves the use of a signal processing technique that simplifies classification and yields optimal results. Two discriminant techniques:- the principal component analysis (PCA) and the multiple discriminant analysis (MDA) were used to investigate the potential to distinguish herb species between several herbs within the same family group. The results showed that the twelve herb species can be better classified using the MDA method compared to the PCA method.
Volume: 5
Issue: 3
Page: 530-535
Publish at: 2017-03-01
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